OPMN port conflict on Sun Solaris

by default, the OPMN service of the Application Server listens on port 6000 and this can conflict with X11 port used for the graphics on UNIX machine.

To avoid this issue:

1) check port 6000 is active

bash-3.00$ netstat -an | grep 6000
      *.6000               *.*                0      0 49152      0 LISTEN
      *.6000               *.*                0      0 49152      0 LISTEN
      *.6000                            *.*                             0      0 49152      0 LISTEN
bash-3.00$

2) Shutdown the dtlogin process with the command "/usr/dt/bin/dtconfig -kill"
3) Confirm that nothing is listening at port 6000 ("netstat -a | grep 6000")
4) Disable the local X console for dtlogin with command "/usr/dt/bin/dtconfig -d"
5) Restart dtlogin with command "/usr/dt/bin/dtconfig -e"

bash-3.00# cd /
bash-3.00# /usr/dt/bin/dtconfig -kill
done
dtlogin kill complete.
bash-3.00# netstat -a | grep 6000
bash-3.00# /usr/dt/bin/dtconfig -d
done
desktop auto-start disabled.
bash-3.00# /usr/dt/bin/dtconfig -e
done
desktop auto-start enabled.
bash-3.00#

Source: Internet